
import pygame
from pygame.sprite import Group

from alien_invasion.settings import Settings
from alien_invasion.ship import Ship
from alien_invasion.alien import Alien
from alien_invasion.game_stats import GameStats
import alien_invasion.game_functions as gf

def run_game():
    pygame.display.set_caption("Alien Invasion")

    #初始化游戏并创建一个屏幕对象
    pygame.init()
    ai_settings = Settings()

    #创建一个状态对象
    stats = GameStats(ai_settings)

    screen = pygame.display.set_mode(
        (ai_settings.screen_width,ai_settings.screen_height))
    pygame.display.set_caption('Alien Invasion')

    #创建一艘飞船
    ship = Ship(ai_settings, screen)

    #创建一个用于存储子弹的分组
    bullets = Group()

    #外星人分组
    aliens = Group()

    #创建一个外星人
    alien = Alien(ai_settings,screen)

    gf.create_fleet(ai_settings, screen, ship, aliens)

    #开始游戏循环
    while True:
        #监视屏幕和键盘
        gf.check_events(ai_settings,screen,ship,bullets)

        if stats.game_active:
            ship.update()
            gf.update_bullets(aliens ,bullets)
            gf.update_aliens(ai_settings, stats, screen, ship, aliens ,bullets)
        #设置屏幕颜色
        gf.update_screen(ai_settings, screen, ship,aliens ,bullets)

run_game()